1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ksivusya [100]
3 years ago
13

A single atom of calcium could combine with a single atom of fluorine, creating electron energy stability for both atoms. True F

alse
Chemistry
1 answer:
Tanya [424]3 years ago
5 0
False. Each atom of calcium needs two atoms of fluorine to create an ionic compound. The atom of calcium could gain stability if it gives the last two electrons in the highest energy level. The fluorine atom only can accept one electron in its highest level of energy to complete it and to reach the lowest energy level. This is the reason because an atom of calcium needs two atoms of fluorine.

If you detect any mistake in my English, please tell me!
You might be interested in
What is the ROUNDED atomic number for this elements?
denis-greek [22]
Sodium/Atomic number

11

Gold/Atomic number

79
Potassium/Atomic number

19

Silicon/Atomic number

14




8 0
3 years ago
Write the equation, Aluminum metal reacts with oxygen gas to produce aluminum oxide solid.
Alenkasestr [34]
The equation is:4Al+3O2----2Al2O3
8 0
3 years ago
The sodium-potassium exchange pump
trapecia [35]

Answer: The correct answer is option E

Explanation:

Sodium/potassium pump is a mechanism that involves the movement of sodium ions (Na+) out of a cell and potassium ions (K+) into a cell, thereby regulating concentration of ions on both sides of a typical cell membrane.

In this situation, the sodium-potassium pump is usually helps in the establishment of the resting potential. The potassium voltage channels normally closes before the membrane potential is brought to a resting level.

In summary, sodium/potassium pump helps to maintain a balance in the system.

6 0
3 years ago
H-1
bonufazy [111]
Answer = B = Neutrons and Mass Number

Isotopes 
are defined as those atoms which have same atomic number but different atomic masses.

Atomic mass is basically the number of protons and neutrons present in an atom.

Atomic number is the number of protons present in an atom.

So, in isotopes the number of protons are same but the number of neutrons vary due to which atomic masses also vary.
In given three isotopes, all have same number of protons but different number of neutrons.
i.e.
H-1 = 1 P + 0 N = 1 u (Proton)
H-2 = 1 P + 1 N = 2 u (Deuterium)
H-3 = 1 P + 2 N = 3 u (Tritium)

Hence, it is clear that the number after H shows a change in number of neutrons and mass number.

7 0
3 years ago
Read 2 more answers
In Keynes's liquidity preference framework, as the expected return on bonds increases (holding everything else unchanged), the e
Julli [10]

Answer:

the correct words to fill up the blank spaces are falls and money

Explanation:

.1. the expected return on money falls

.2. causing the demand for money to fall.

3 0
3 years ago
Other questions:
  • Why would the reliability of results collected for an experiment increase when several groups of students conduct the same exper
    9·1 answer
  • Calculate the wavelength of the light emitted when an electron in a one-dimensional box of length 5.4 nmnm makes a transition fr
    14·1 answer
  • What are abiotic factors HELP FAST PLEASE!!!!!!!!! FIRST ONE GIVEN BRAINLIEST AND 50 POINTS
    15·2 answers
  • Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of th
    10·1 answer
  • On the periodic table, which groups of elemen tend to positive ions? A. Group 1 and Group 2 B. Group 16 and Group 17 C. Group an
    11·1 answer
  • A compound is made of 49.31% C, 43.79% 0 and the rest hydrogen. The molar
    9·1 answer
  • 54:63 ratio simplest form?
    11·1 answer
  • A candle is placed between a concave mirror and its focal point.
    11·2 answers
  • Which hypothesis regarding the origin of life on Earth suggests that oxidation-reduction (redox) reactions may be responsible fo
    12·1 answer
  • Why does water have a very high boiling point?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!